Core booking apparatus



H. L. DEMMLER CORE BOOKING APPARATUS Sept. 8, 1931.

2 Sheets-Sheet 1 Filed Feb. 21, 1927 \Y f I N f; .1|1\ Z a W 0. W w M v 7 J 6 R j II 0 M 0 J 1 H n. .77 R 7 1 mx Q Q a QN! p 8, .9 H. L; DEMMLER 1,822,205

CORE BOOKING APPARATUS Filed Feb. 21, 1927 2 Sheets-Sheet 2 Patented Sept. 8, 1931 HENRY L. DEMMLER, =OF :KEWANEE, :ILLINOIS CORE BOOKING APPARATUS Application "filed 'Februaryfll, 1927. Serial No. 169,811.

This invention relates to :machines "for manufacturing cores required :in foundry Work and while particularly applicable "for manufacturing cores Where a large number of duplicate cores are required it is-equally applicable to the manufacture iofdissimilar cores in rapid succession.

#Heretofore, cores have been made :by hand, or in partfbyimachine and in part by hand,

either way being tedious and slow :ifsatisfactory. Those machines which have "been devised for aid in the .manufactureo'f cores have never been more than semi-automatic; that is, the machines have :been arranged-to carryout one ortwo of the steps incident tocore manufacture automatically, but for the other steps manual operation or .manual aid of the machine to cause it to function properly has been necessary. Numerous efforts have :been made to provide .a ma chine entirely. automatic as regards the essential steps of core manufacture, ibut .-so far asil am aware no onelhas been-successful.

It is one ofthe .primaryxobjectsofmy invention to provide .a core making machine automatically operative :to -book two halves of a core box in :Which the half cores are formed, to return the booked core box from booking position Wherethe top half .may .be

removed for access tothe fonmed core, to

vibrate :or .tamp :the booked core box shalves so that the core Will be loosened ifIOIl'l the half to .be removed and the sand or other material of which the core iscomposed will betightly-compacted, to lift the top half of the corenboxlfromthe bottomlialf and return it to its initial position for refilling, and ato repeat .these stated operations in cyclic sequence at a rapid ratevvith extreme accuracy. Another object is to provide simple and effective means for removably holding acore box half on a supporting structure :and in properindexed relationto a complementary coreboz; half to be booked therewith and to provice means for holding :the core box halves together and against displacement from one another-after: they Ehaveibeen booked a-nauntil it .is desired tosremove oneboxlhalf from the other to remove theco-re.

Another'object is to provide :an automatic fluid operated mechanism :for ;booking the core box ihalves, for returning the booked halves -to .a horizontal position, for vibrating the core .box .and for slitting the top half of the core box .or for separating the cone box halves after :the .core .has been stormed, :and automatic mechanism, for (controlling said mechanism.

A further object is to provide magnetic means for holding :one :core box :half to its support and far :secuning lbOiih halves .together hen itheyzhave been booked together and .automatic :means -.operative in predetermined time relation tothe operation-of other mechanism of the machine for controlling the magnetic means.

:Still ,fiurther objects include (the provision of 1a .noveL-anrangement for lifiting :the top halfef-the'core box, i..-:e., for separatinggthe core box ihZlliVQS .iniorder :to :remove the lower half, i. e. one-ofzthehalves Jfromits support so Jtllibt .the formed 'eore may ;be removed therefrom z-and a machine simple and easyto construct and operate as well as one which may be :cheaply ;manufactured.

Many furthcnobjects including the details of construction, theanrangement oftheiparts, their functions or operations, and advantages will be or should become quicklyappreciated after "reading the following description ,and claims :and after viewing the drawings in which:

Fig. 1 lisgassection of :a :preferred :formiof myinventiontaken o-nythe line I-I ofFig. ,4.

Fig. 12 is end velevationiofjthermachine looking from the left handend. of Fig. 4.

Fig. 3 iszaside elenation'thereof.

.Fig. :4 isga top .plan iview, and

Figs. 5.,=6 andi7 are more or less diagrammatic views oflthe fluid and electricalEcontrol apparatus.

In order to i simplify .an understanding of What is-at :present a preferred form of my invention :the embodiment of .the machine illustrated will doe-described primarily from a structural standpoint, although the operation will be interwoven therewith. Also for the purpose of simplification the control mechanismzwill be 'referredsto simply as such for the present and not by reference character construe the expressions, and other expressions and terms used in the description and claims are likewise not to be construed in their narrower senses except where the state of the art and the manner or way in which they are used expressly limit them.

The machine is mounted upon a frame which comprises a base 2 with suitable standards 3 rising therefrom and interconnected together in any desired or preferential way. The tops of the standards 3 at each end of the machine are joined together by angle plates 4 the tops of which serve to supportthe core boxes or core box supports in a horizontal open position for filling, as will be described. Intermediate the ends of the top portions of the angle plates 4 a pair of aligned brackets 5 are secured. A hinge pin 6 is mounted through and secured to these brackets and on this hinge pin a pair of frames or core box supports generally designated 7 and 8 for the lower and upper halves of a core box respectively are pivotally mounted. In order to positively position one core box support with respect to the other longitudinally of the axis of the pivot, the frame. 7 at its pivoted end is preferably of yoke-shape, as shown at 9, for reception of the frame arms 11 of the frame 8.

The frame 7 is composed of the two yoke arms 9 rigidly connected together at their outer ends by means of an iron plate 12 adapted to support what I shall term the lower half 13 of a core box, and for the purpose of positioning the same thereon two or more dowel pins 1 1 are secured in the plate 12 and project into receiving openings formed in the bottom of the core box half 13, while for the purpose of removably securing the core box half to the plate two or more magnets jointly designated 15 are secured to the bottom of the plate. The opposite frame or supporting member 8 not only includes the arms 11 but also a pair of arms 16 which are hinged to the arms 11 by a. hinge pin 17 so that one pair of arms may swing relatively to the other. The arms 16 are secured to gether by a plate 18 to which the top half 19 of a core box is preferably rigidly and semi permanently secured, that is, so that the top half may be removed when it may be necessary to replace it with a different mould.

The frames 7 and 8, being pivotally connected together as above described, are adapted to be raised from their positions illustrated in full lines in Fig. 1 to booking posi tion or a position where they are placed together to book the core and as shown by the dotted lines in said figure, and in order to accomplish this end an air or other fluid operated cylinder 21 which fits over a piston 22 suitably mounted on the base 2 is adapted to raise and lower the frames 7 and 8 through the intermediary of rods 23 and 2%, each of which is pivotally connected intermediate of its ends to the cylinder 21 by means oi a cross head 25 and each of which is provided at one end with a roller 26 for engagement with the bottoms of plates 12 and 18 and at their other ends with guide rollers 27 guided in slots 28 formed in guide plates 29 suitably secured to the base 2 and standards 3. As these rods are operated by the rising of the cylinder 21 they are raised and raise the frames 7 and 8 carrying the top and bottom portions of the core box or core box supports to bring them together or book them, but as it is ordinarily necessary to carry the booked core box to a horizontal position in order to remove the top half without spoiling the core it becomes necessary to book the core boxes in a position inclined from the vertical, that is, at one side of dead center of the pivot rod 6. In the present embodiment this is accomplished through the cooperation of the rods 23 and 24 and slots 28. The top of the rod 2% in normal down position being disposed slightly above the level of the top of the roc 23 and the slots 28 being arranged to diverge upwardly and outwardly from one another, the net result is that as the rods are moved upwardly to move the core box supports and frames 7 and 8 about the pivot 6, 7

the top ends of the rods will converge to follow the frames and core box halves in their circular motion and by reason of the greater reach of the rod 24: book the core box halves at a place to one side of dead center of the pivot 6. The side of dead center at which the core boxes should be positioned when booked is, of course, determined by the side to which the booked halves are to be lowered for removal of the top half.

I have found it preferable, although not always necessary, to secure the core box halves, when booked, firmly together so that they cannot become displaced from one another after being booked and until the time comes to remove the top half for removal of the core. To this end both the upper and lower halves 18 and 19 of the core box are each at one edge provided with a flange 31 adapted to abut one another, and one of the flanges, preferably that on the top half 19, has one or more magnets 32 secured beneath it so that when the flanges 31 come together and the magnets magnetize the flanges the box halves will be tightly held to one another. After the box halves have been booked together they are lowered in booked condition to the left hand side of Fig. 2 where the lower half assumes its former position with the top upon it. This is accomplished merely by exhau'sting the air from the cylinder 21, the rods 23 and 24 sinking to their initial positions thereby.

When the core boxes have reached this last mentioned position it is usually necessary to vibrate them somewhat in order to compact the sand core and loosen it from the top half so that the top half may be removed without destroying it. For this purpose the top half or the top half support is provided with a pneumatic vibrator 33, such as that described in my Patent No. 1,480,749, dated January 15, 1924, or with an electrical vibrator of any of the well known types as may be desired. As soon as the booked core'boX has been lowered the vibrator is operated, to accomplish aforementioned ends, through operation of the control mechanism.

After the core has been vibrated from the top half at least, the top half is removed and returned to its initial position. This is accomplished by means ot'a second cylinder 34 and cross head 35 similar in all respects with cylinder 21 and cross head 25 operating in conjunction with a piston 36 suitably sup ported on the base 2. .Pivotally connected to the cross head 35 is a rod 37 the top end of which is provided with a lateral extension 38 in turn provided with a set screw ,39 and with a roller 41, and the bottom end of which is providedwith a guide roller 42 operating in 2 slot 43 formed in a guide plate 44 secured to the base 2 and one of the standards 3. The top half of the core box has its flange 31 extended at one end, as shown at 45 (see Fig. 4), beyond the sides of the arms 11 for engagement with one of said arms 11, as will later appear, and its top face with the top of set screw 39 and roller 41when the cylinder 34 rises. The opposite side of the cross head 35 is preferably rigidly secured to a rod 46atits upper end carrying a roller 47 adapted to enbeneath the bottom face of the flange 45 for lowering the top half of the core box to its initial position.

The top half of the core box is preferably lifted vertically from the bottom half and in horizontal plane for a predetermined dis tance in order that it may. substantilly clear the core remaining in the bottom half before itis returned to its initial position and this is accomplished by reason of the double hinge frame for the top half and the set screw 39 and roller 41. As the cylinder 34 rises the set screw 39 and roller 41 simultaneously engage beneath the flange 45. and raise the same in a substantially horizontal position vertically from the lower half of the core box, the arm 16 swinging about its pivot 17 relative to the arm 11, and the arm 11 swinging relatively about its pivot 6 for this purpose until the flange 45 engages the arm 11,as shown at48 in the dotted line position at the left of Fig. 2, whereupon further rise of the cylinder 34 swings the frame'and core box half about the tion to one another.

pivot 6 until, by reason of the outwardly diverging part 49 of the slot 43, the rod 37 carries them beyond dead center of the pivot 6 whereupon they are caught by the roller 47 on the rod 46 and lowered to their original position upon recession of the cylinder 34.

The control mechanism for admitting air or other fluid into the cylinders 21 and 34 and for energizing the magnets 15 and 32, all in predetermined time relation, is illustrated, as aforementioned, in Figs. 5, 6 and 7 to which reference will now be made. The control apparatus is shown mounted on the horizontal support 51 and a vertical support 52 which may, for the purpose of illustration, be a floor and wall. From the floor 51 rise suitable bearing supports 53 (one only shown) for the support of a shaft 54 on which a pulley 55 and cams 56, 57 and 58 are secured, the cams being fixed in predetermined rela- Any suitable source of power transmits power througha belt or the like through pulley 55 and drives the shaft 54. Mounted on the vertical wall 52 and above the cams 56 and 57 are slide valves generally designated 59 and 61 respectively for the control of the two cylinders 21 and 34 and the vibrator 33. Each of these slide valves being substantially identical, a description of one will suffice for both. Within the slide valve chamber, the slide valve proper designated 62 moves under the influence of a valve rod 63 connected through an arm 64 pivoted at 65 and provided with a cam follower roller 66 to the cam 56, to supply a fluid under pressure through pipe 67 to cylinder 21 and through pipe 68 to cylinder 34 and to alternately exhaust the fluid therefrom through pipe 69. A supply pipe for fluid under pressure is designated 71. As the cam 56 rotates, a projection thereon raises the valve 62 to admit fiuid to the pipe 68 and a depression therein lowers the valve under the influence of a spring 72 to admit fluid to the pipe 67. Operation of the valve 61, which is connected to the vibrator, is so similar, it is not deemed necessary vto describe it. The cam 58 is adapted to operate an electrical contact mechanism or switch, more or less diagrammatically illustrated in Fig. 7, from which it will be seen that a pair of contacts 73 and 74, the first stationary and the second movable about a pivot 75 and carrying a rocker arm 76 having a cam follower roller 77 and being urged downwardly by a spring 7 8. make or break an electrical circuit for control of the magnets 15 and 32.

The cams on the control shaft 54 are so arranged as to operate their various mechanisms in turn to operate the machine elements in predetermined timed relation to one another and preferably in such order and time that the core box halves will remain in the full line of position illustrated in Fig. 1 for the time necessary for an operator to fill them with sand or other material for making the core. Thereafter, air or other fluid is admitted to the cylinder 21 which raises the core boxes and their frames to the positions illustrated in dotted lines in Fig. 1. Immediately upon the admission of air to the cylinder 21, or just prior thereto, or just thereafter, the contacts 73 and 74 are closed under the influence of cam 58 to energize the magnets 15 and 32 which thereupon serve their functions as aforestated. The air or other fluid is then exhausted from cylinder 21,, and cam 57 comes into operation to admit air or other fluid to the vibrator 33, and after a predetermined interval, action of the vibrator is stopped and air is admitted to cylinder 34; so that the top half of the core box may be lifted from the bottom hali and returned to its initial position. Just prior to the admission of air to cylinder 34-, the contacts 73 and 74 are opened, as will be understood. The operator may then remove the core box half 13 from the machine and replace it with one similar thereto for a repeated booking operation and the cycle above described may be repeated very rapidly and often as desired.

lVhile I have described and illustrated what is at present a preferred form of the invention, it should be understood that the invention is susceptible of embodiment in many other machines bearing slight if any resemblance thereto and I do not therefore desire to be limited except by the spirit or" the invention and the scope of the appended claims.

I claim:

1. In a core booking machine, a stationary support, complementary core box parts pivotally connected to said support for movement with respect to one another into booking position, and means independent of and engageable with said parts for moving said parts when filled into booking position and automatically operative thereafter for Il'lU\' ing the booked parts together to a second position.

2. In a core booking machine, a stationary support, complementary core box parts pivotally connected to said support for movement with respect to one another into booking position, and fluid operated means releasably engageable with the undersides of said parts for moving said parts when filled into booking position and for thereafter automatically moving the booked parts together to a second position.

3. In a core box booking machine, complementary halves of a core box relatively hinged together at one side of each means for holding said box halves in a substantially horizontal filling position, means releasably engageable with said halves for automatical ly moving said halves relatively to book them together and thereafter moving the booked t halves together to a position for removal of the core, and automatically operative means for vibrating the core box halves When booked.

4. In a core box booking machine, complementary halves of a core box relatively hinged together at one side of each, means for holding said box halves in a substantially horizontal filling position, means for moving said halves relatively to book them together and thereafter moving the booked halves together to a position for removal of the core, and automatically operative magnetic means for holding the core box halves together when booked.

5. A machine for automatically booking core boxes comprising a supporting member for each half of a core box, the supporting members for complementary core box halves being pivotally connected together whereby they may be moved toward one another for booking the core box halves, means for moving said supporting members from core box filling positions to book complementary core box halves and thereafter moving the booked halves together toward one of said filling positions, means for removing the top half of the booked core box, and means for operating the first and second said means in sequence automatically.

6. A machine for automatically booking core boxes comprising a supporting member for each half of a core box, the supporting members for complementary core box halves being pivotally connected together whereby they may be moved toward one another for booking the core box halves, means for automatically swinging said supporting members from core box filling positions to a booking position and for returning the said members in booked relation to the initial position of one of them, neans for removing the topmost core box half, and means for automatically operating the first and second means in predetermined timed relatlon.

7. A core box booking machine comprising means for holding core box halves for filling them, means for booking complementary core box halves, means for separating the booked halves, and means for automatically operating all of said means.

8. A core box booking machine comprising means for booking complementary core box halves, means for separating said booked halves, and means for automatically operating the first and second said means in timed relation.

9. A machine of the character described comprising means for holding core uox halves separately and open for filling, means for booking complementary halves together, means for vibrating the booked halves, and means for automatically operating all of said means in predetermined timed relation.

10. A machine of the character described comprising means for holding core box halves in open position for filling, means for bookcore box half to one of said supports during ing complementary halves together, means for vibrating the booked halves, means for separating one core box half from its complementary half after operation of said vibrating means, and means for automatically operating all of said means in the sequence named.

11. A machine of the character described comprising means for booking filled complementary core box halves including means for moving the booked halves to a position where the plane of division of the box halves is substantially horizontal, and automatically operative means for moving one of said halves from the other in a path substantially perpendicular to said plane.

12. A core box booking machine comprising, means for holding core box halves in filling position for filling them, means for booking complementary core box halves, means for separating the booked halves for removal of the core formed therebetween, and fluid operated means for automatically operating all of said means.

13. A core box booking machine comprising means for booking complementary core box halves, automatically operative means for separating said booked halves, and fluid operated means for operating the first and second said means in predetermined timed relation.

14. A machine of the character described comprising, means for holding core box halves separately and openly for filling them, automatically operative means for booking complementary halves together, automatically operative means for vibrating the booked halves, and fluid operated means for operating all of said means in predetermined timed relation to one another. 7

15. A machine of the character described comprising, means for holding core box halves in open position for filling them, means for booking complementary halves together, means for vibrating the booked halves, means for separating one core box half from its complementary half after operation of said vibrating means, and fluid controlled means for operating all of said means automatically in the sequence named. 16. A machine of the character described comprising, means for booking complementary core box halves including means for moving the booked halves to a position where the plane of division of the box halves is substantially horizontal, and fluid operated means thereafter automatically operative to move one of said halves from the other in a1 path substantially perpendicular to said ane. p 17. In a machine of the character described, core box supports mounted for relative swinging movement toward and from one another, magnetic means for securing one certain of said relative movements, and means for swinging one core box half about its center of swinging movement past vertical dead center of the half with respect to said center of movement.

In witness of the foregoing I aifix my signature.

HENRY L. DEMMLER. 

